I'd keep the data in one worksheet.
Then use data|filter|autofilter to see the info that I want. I think you'll
find that this is the easiest solution.
But if you really, really must. Keep the data in one worksheet and refresh the
worksheets whenever you need (not while doing input--just run the macro when
you're ready).
Ron de Bruin's EasyFilter addin:
http://www.rondebruin.nl/easyfilter.htm
Code from Debra Dalgleish's site:
http://www.contextures.com/excelfiles.html
Create New Sheets from Filtered List -- uses an Advanced Filter to create
separate sheet of orders for each sales rep visible in a filtered list; macro
automates the filter. AdvFilterRepFiltered.xls 35 kb
Update Sheets from Master -- uses an Advanced Filter to send data from
Master sheet to individual worksheets -- replaces old data with current.
AdvFilterCity.xls 55 kb
If you're new to macros, you may want to read David McRitchie's intro at:
http://www.mvps.org/dmcritchie/excel/getstarted.htm